期刊
COMPTES RENDUS CHIMIE
卷 13, 期 5, 页码 527-537出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.crci.2009.12.006
关键词
Faujasite Y; Ion exchange; Rare earths; Toluene disproportionation
The catalytic performance of exchanged Y faujasites by Ce3+, La3+, UO22+, Co2+, Sr2+, Pb2+, Tl+ and NH4+ ions were studied in a disproportionation reaction in the gaseous phase. It was shown that total acidity generated by exchanged ions is responsible of the catalytic activity. Rare earths (cerium, lanthanum and uranium) catalysts have appreciable performance and allowed one to obtain an important xylenes proportion at 400 to 450 degrees C. The decrease of xylenes and trimethylbenzenes proportion in studied catalysts shows the implication of xylenes in toluene disproportionation reaction. (C) 2010 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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